Product Overview

The Pentair 77707-0010 Thermal Regulator Kit is a genuine OEM replacement heater part designed for Pentair MasterTemp and Sta-Rite Max-E-Therm pool and spa heaters. The thermal regulator helps control water temperature movement through the heater’s internal water system and supports proper heater operation.

This kit is commonly replaced when the heater is experiencing temperature regulation issues, overheating symptoms, high-limit errors, poor heating performance, or water-flow related heating problems. It is an important service part for maintaining safe and efficient heater operation on compatible MasterTemp and Max-E-Therm models.

Ideal For

Pentair MasterTemp heater repairs
Sta-Rite Max-E-Therm heater repairs
Pool and spa heater maintenance
High-limit troubleshooting
Temperature regulation issues
Replacing worn or stuck thermal regulators
Pool service technicians
Gas heater service repairs

Key Features

Genuine Pentair OEM replacement kit
Designed for Pentair MasterTemp heaters
Designed for Sta-Rite Max-E-Therm heaters
Helps regulate water temperature through the heater water system
Supports proper heater operation and temperature control
Commonly replaced during heater overheating or high-limit troubleshooting
Includes thermal regulator, cap, spring clip, and O-ring
Direct replacement for compatible heater models
Designed for professional service repairs

Benefits

The Pentair 77707-0010 helps restore proper water temperature regulation inside compatible MasterTemp and Max-E-Therm heaters. A failed or stuck thermal regulator can contribute to heater performance issues, overheating, short cycling, high-limit faults, or inconsistent heating.

Using a genuine Pentair replacement kit helps ensure proper fitment with compatible heater water systems and reduces the risk of incorrect aftermarket part sizing or fit issues. This kit is a practical repair part for pool professionals servicing Pentair and Sta-Rite gas heaters.

Specifications

Customer-Facing Q&A

What does the Pentair 77707-0010 thermal regulator do?
The thermal regulator helps control water temperature flow through the heater’s internal water system so the heater can operate properly.

Which heaters does this kit fit?
This kit is designed for Pentair MasterTemp and Sta-Rite Max-E-Therm pool and spa heaters.

What comes in the kit?
The kit commonly includes the thermal regulator, cap, spring clip, and O-ring.

Is this an OEM Pentair part?
Yes. This listing is for a genuine Pentair OEM thermal regulator kit.

Can this fix a high-limit error?
It may help if the high-limit issue is caused by a stuck, failed, or improperly operating thermal regulator. Other causes can include low water flow, dirty filters, bypass issues, scale buildup, bad sensors, or heater control problems.

Is this the same as the manifold bypass kit?
No. The thermal regulator kit and manifold bypass kit are different heater parts. Confirm your diagnosis and parts diagram before ordering.

Can homeowners install this part themselves?
Heater parts should be serviced by a qualified pool professional or technician familiar with gas pool heaters. Always shut off power and gas before servicing heater components.

Confirm Before Ordering

Confirm your heater model and part number before ordering. This kit is designed for Pentair MasterTemp and Sta-Rite Max-E-Therm pool and spa heaters. Heater symptoms such as high-limit errors, overheating, short cycling, and poor heating can have multiple causes, so proper troubleshooting is recommended before replacing parts.

Gas heater components should be serviced by a qualified professional. Always follow the manufacturer’s service instructions and shut off power, gas, and water flow before performing repairs.